Home / 9,139.35-12,605.79-6,307.80

Finding the Fourth Proportional to 9,139.35, 12,605.79 and 6,307.80

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Solution

The fourth proportional to 9,139.35, 12,605.79 and 6,307.80 is: 8,700.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,139.35 : 12,605.79 = 6,307.80 : x
  2. Step 2: Convert to fraction form
    9,139.35/12,605.79 = 6,307.80/x
  3. Step 3: Cross multiply
    9,139.35x = 12,605.79 × 6,307.80
  4. Step 4: Simplify right side
    9,139.35x = 79,514,802.16
  5. Step 5: Solve for x
    x = 79,514,802.16/9,139.35
  6. Step 6: Final answer
    x = 8,700.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.